All Loop Players default to Mountain Standard Time. You'll want to set this to ensure your scheduled day parts are changing at the correct time of day.
In order to change your Loop Player's Time Zone settings, click on the 'Home' button on your remote control (house icon) and select 'Settings.'
Scroll down with your remote and click on "Device Preferences."
Then, click on "Date & time."
Scroll down again to highlight "Select time zone." Press 'OK'
Select your time zone and press "OK". You're all set! Your Loop Player is now set to your time zone.
You can also ensure that the Automatic date & time option is toggled to 'On.'